diff --git a/pattern_library/monkey_utils.py b/pattern_library/monkey_utils.py
index 956e638b..1859562f 100644
--- a/pattern_library/monkey_utils.py
+++ b/pattern_library/monkey_utils.py
@@ -7,7 +7,6 @@
 from pattern_library.utils import is_pattern_library_context, render_pattern
 
 logger = logging.getLogger(__name__)
-UNSPECIFIED = object()
 
 
 def override_tag(
@@ -78,7 +77,7 @@ def node_render(context):
                     # Render result instead of the tag, as a string.
                     # See https://github.com/torchbox/django-pattern-library/issues/166.
                     return str(result)
-                elif default_html is not UNSPECIFIED:
+                elif default_html is not None:
                     # Render provided default;
                     # if no stub data supplied.
                     return default_html
diff --git a/tests/templates/patterns/atoms/tags_test_atom/tags_test_atom.html b/tests/templates/patterns/atoms/tags_test_atom/tags_test_atom.html
index c7945bc8..ce9895c1 100644
--- a/tests/templates/patterns/atoms/tags_test_atom/tags_test_atom.html
+++ b/tests/templates/patterns/atoms/tags_test_atom/tags_test_atom.html
@@ -4,10 +4,12 @@
 SAND{% error_tag none %}WICH
 SAND{% error_tag zero %}WICH
 
-POTA{% default_html_tag page.url %}TO 
+POTA{% default_html_tag page.url %}TO
 POTA{% default_html_tag page.child.url %}TO
 POTA{% default_html_tag None %}TO
 
 POTA{% default_html_tag_falsey empty_string %}TO1
 POTA{% default_html_tag_falsey none %}TO2
-POTA{% default_html_tag_falsey zero %}TO3
\ No newline at end of file
+POTA{% default_html_tag_falsey zero %}TO3
+
+Real tag usage: {% pageurl page %}
diff --git a/tests/tests/test_tags.py b/tests/tests/test_tags.py
index ee88b900..37dabf44 100644
--- a/tests/tests/test_tags.py
+++ b/tests/tests/test_tags.py
@@ -4,6 +4,17 @@
 
 
 class TagsTestCase(SimpleTestCase):
+    def test_real_tag_usage(self):
+        response = self.client.get(
+            reverse(
+                "pattern_library:render_pattern",
+                kwargs={
+                    "pattern_template_name": "patterns/atoms/tags_test_atom/tags_test_atom.html"
+                },
+            )
+        )
+        self.assertContains(response, "Real tag usage: /page/url")
+
     def test_falsey_raw_values_for_tag_output(self):
         response = self.client.get(
             reverse(